Corrigendum: Novel technique to suppress hydrocarbon contamination for high accuracy determination of carbon content in steel by FE-EPMA.
Corrigendum: Novel technique to suppress hydrocarbon contamination for high accuracy determination of carbon content in steel by FE-EPMA.
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DOI：
10.1038/srep33940
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发表时间：
2016-09-30
影响因子：
4.6
通讯作者：
Ishida K
中科院分区：
文献类型：
--
作者：
Yamashita T;Tanaka Y;Nagoshi M;Ishida K
在多相钢中，控制各相中的碳含量是合金设计中实现高强度和高延展性的最重要因素。然而，由于测量过程中不可避免的碳氢化合物污染的影响，通过电子探针显微分析（EPMA）以高精度确定多相结构中的碳含量异常困难。我们已经研究了抑制碳氢化合物污染的新方法，在场发射（FE）EPMA测量以及传统的液氮阱。试样室内的等离子体清洁器改善了点分析法测定碳含量的效果，将精度从之前的0.1质量%C提高到0.01质量%C。约100 °C的阶段加热显著抑制了连续点测量和映射期间的污染增长。通过以上两种技术的结合，我们成功地可视化了双相钢中碳的二维分布。还注意到铁素体/马氏体界面处的碳浓度在所有界面上不相同，并且观察到局部变化。开发的技术预计将是一个强大的工具，了解机械性能和微观组织演变的机制，从而有助于设计新的钢材产品具有上级性能。
In multiphase steels, control of the carbon contents in the respective phases is the most important factor in alloy design for achieving high strength and high ductility. However, it is unusually difficult to determine the carbon contents in multiphase structures with high accuracy by electron probe microanalysis (EPMA) due to the unavoidable effect of hydrocarbon contamination during measurements. We have investigated new methods for suppressing hydrocarbon contamination during field emission (FE) EPMA measurements as well as a conventional liquid nitrogen trap. Plasma cleaner inside the specimen chamber results in a improvement of carbon-content determination by point analysis, increasing precision tenfold from the previous 0.1 mass%C to 0.01 mass%C. Stage heating at about 100 °C dramatically suppresses contamination growth during continuous point measurement and mapping. By the combination of above two techniques, we successfully visualized the two-dimensional carbon distribution in a dual-phase steel. It was also noted that the carbon concentrations at the ferrite/martensite interfaces were not the same across all interfaces, and local variation was observed. The developed technique is expected to be a powerful tool for understanding the mechanisms of mechanical properties and microstructural evolution, thereby contributing to the design of new steel products with superior properties.
影响因子：
4.6
作者：
Yamashita T;Tanaka Y;Yagoshi M;Ishida K
通讯作者：
Ishida K